Every bath bomb or bubble bar recipe that I have ever made involves mixing your well blended dry ingredients with your oils/fragrance/poly80 or wet ingredients. Today I came across an old article in Marie Claire with photos from a Lush tour. They included photos of an employee making bath bombs and gave a very broad overview of ingredients and how they are assembled. The instructions showed the employee blending their baking soda and colorant with oils and butters until completely mixed and then right before molding, they added the citric acid. Is there a benefit to adding citric acid after mixing your dry and wet ingredients? I’ve always heard that you should mix your baking soda and citric acid before adding any additional dry ingredients and then mixing in oils and liquids.